For converting VMs that run on VMware to run on KVM. After Broadcom purchased VMware a couple of years ago & raised prices (in some cases up to 10x), lots and lots of businesses are desperate to leave VMware. The open positions can be found on the Red Hat website if you search roles for "virt-v2v".
Right, we don't mention it in the advert because doing so draws in a certain type of academic person that we don't want to hire. Also because the majority of the code is actually in other programming languages, and we can easily train up (eg.) an ace C coder in OCaml if we need to.